Typewriting-calculating machine



April 1, 1941. H. E. KAMMEL 2236.642

TYPEWRITING CALCULATING MACHINE Filed May 14, 1934 16 Sheets-Sheet 1 April 1941- H. E. KAMMEL 2.236.642

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Filed May 14, 1934 16 Shaets-Sheet 16 ulah'ny mm 2 I fall LL" m imma/w Patented Apr. 1, 1941' 2,236,642 v TYPEWRITING-CALCULATIN G MACHINE Hugo Ernst Ktimmel, Zella-Mehlis in Thuringia,

Germany,

assignor to Mercedes Biiromaschinen-Werke Aktiengesellschaft, Benshausen, Thuringia Postamt Zella-Mehlis, Germany Application May 14, 1934, Serial No. 725,636

' In Germany May 15, 1933 10 Claims. ((31. 235-59) The invention relates to a typewriting-calculating machine.

The machine according to the invention provides typing keys and numeral keys, whereby when it is desired to enter a series of items in a corresponding totalizer said items may be typed at the same time on a bill arranged in the typewriting calculating machine. This result is obtained by depression of the numeral keys, which depression causes automatically the typing of the calculated items on said bill. Such value calculating and typing mechanisms have previously been known.

They had, however, the disadvantages that their whole construction was more or less complicated, since for the value calculating and typing a great number of parts were provided. For this reason the machines were expensive in construction and their operation was unreliable.

According to the present invention these disadvantagesare now obviated by providing universal members which are arranged between the calculating mechanism and the typing keys and which effect the typing and calculating operations of the items.

Figure 1 shows a front elevation of the whole typewriting-calculating machine.

Figure 2 shows a plan of the machine according to Figure 1.

Figure 3 shows a left-hand side elevation of the machine.

Figure 4 shows a front elevation towards the calculating members together with the calculating segment and a part of the change-over gear for the cross-totalizers, in which view the number typing keys and the letter typing keys are represented in section. 1

Figure 5 shows a plan of the drive frame toelevation towards the calculating key lock, viewed in the direction of the arrow a3 of Figure 8.

Figure 10 shows a perspective illustration of the transmission and control mechanisms arranged between the typing and calculating keys, viewed from the front left-hand side of the machine, to-

gether with the change-over gear for the column totalizers and a part of the change-over gear for the cross totalizers, in which view the individual parts are illustrated drawn out from one another.

Figure 11 shows a perspective illustration of the master locking mechanism controlled by the column totalizers, viewed from the front lefthand side of the machine.

Figure 12 shows a perspective illustration of the gear for reversing the calculating sense for the column and cross totalizers, viewed from. the front leftshand side of the machine.

Figure 13 shows in perspective the unlocking mechanisms for the column and cross totalizers, viewed from the front left hand side of the machine.

Figure 14 shows in perspective the control, known in itself, for the coupling arranged between both the driving wheels of the cross totalizers, viewed from the front left-hand side of the machine.

Figures 15 and 16 show in section detail parts in respect to Figure 10, Figure 15 showing the unlocking mechanisms and Figure 16 details of the value-transmitting mechanism.

Figure 17 shows a perspective illustration of a locking lever with looking flap, viewed from the left-hand edge of the rear side of the totalizer.

gether with the calculating keys and the drive from the left of this figure.

Figure 9 shows on a reduced scale. a front .aa'of Figure 16.

invention, wherein the'modification in spite of 1 its apparent insignificance is portance.

Figure 23 shows a detail. Figure 24 shows in front elevation the general nevertheless of imshift procedure of.the kind of calculation for the cross totalizers according to the example of calculation illustrated inFigure 27.

Figure 29 is an operation time diagram.

General description of the machine I The hereinafter described machine parts do not belong to the invention but have been briefly described for the better understanding of the parts belonging to the invention.

The machine housing I (Figures 1 and 3) carries by means of rails 2 and 3 the paper carriage 5, which a platen, 5 (Figure 3) is arranged. To the front side of the paper carriage, there is fixed a supporting rail 1, for carrying the column totalizers T, which will be hereinafter described in detail.

- To the right-hand side of the paper carriage 4, the carriage release lever 8 (Figure 3) is swinga ably mounted and to an extension of this lever a carriage release bar 8, is fixed. This bar is rigidly connected at its other side with a lever I8,

which is swingably mounted on the left hand side of the paper carriage, on a screw ll.

The carriage release lever 8, release bar 9 and lever l8 form part of mechanism for releasing the usual carriage escapement mechanism in the usual manner which mechanisms being well known in the art have not been illustrated in detail and need not be further described.

For the purpose of the mechanical line-shift and for the return of the paper carriage'there is,

further, on the carriage 4, a rack l2 (Figures land 3) which is displaceably mounted by screws [12?) engaging with the slots i211. With the rack 52, engages a toothed wheel l3, which is pinned on a shaft M. This shaft is mounted in a stationary bearing i5, and carries a rigidly mounted bevel wheel i6 on its end, remote from the toothed wheel 03. With the bevel wheel 16, engages a bevel wheel ill (Figure 1) which is fixed on a shaft is. The shaft i8 is ,rotatably mounted in a hearing it, rigidly connected to the machine frame, and on its other end is provided with a spur wheel 28, which, on its part, engages with a spur wheel 23, which is rotatably mounted on a shaft 23, arranged in the bearing 22. The spur wheel 2!], again, is in engagement with the spur wheel 25, which is rotatably mounted on the shaft 26, the spur wheel 25, on its part meshing with a spur wheel 26, formed as part of a coupling 28a, The wheel 26, is loosely rotatable and axially displaceable on apart 21 (Figure 1) of a cam shaft C (Figure 3) which drives the type levers. On the part 27, further, a second coupling half 27a is fixed which is formed similarly to the spur wheel 28, butis not axially displaceable. The shaft 2?, is rotated in the direction of the arrow a (Figure 3) by means of a screw 29 (Figures l. and 3), and a .worm wheel 38, driven by a motor M which is arranged on the righthand side of the machine.

-The line shift and the carriage returnis effected by bringing the coupling half 26, into engagement with the coupling half 28, of a lever 3|, which is operated by the right-hand margin stop Mr (Figure 1). Such engagement of said halves and operation of said lever 3i operates the hereinbefore described wheel drive l3 to 26, and the rack l2, to effect line spacing of the platen 5 and the return of the carriage to the right in a manner and by associated means fully described in U. S. Patent No. 1,582,788 to which attention is directed. The opening of the coupling 26, 26 is effected by the left-hand margin stop Ml, as the paper carriage 4 runs into its extreme right-hand position to uncouple said halves 26 and 28. ,fI'he typewriter mechanism proper comprises letter keys 32, number keys 33 and calculating keys 34 (Figs. 1, 2, 3 and 10) mounted upon key levers 36, 35 and 82, respectively, movable downwardly around pivot 31 against the action of springs 38. The calculating keys 34 act indirectly on the number key lever 35 in a manner and by means as described under the headings Operation of the calculatand the draw hook is acted upon continuallyround its pin 46 in the anti-clockwise direction by means of a tension spring 58, and presses upwards against a stop 5|, whereby its normal position isdetermined.

On the draw-hook, 49, the control tooth- 49c,

' provided with two' teeth 49a and 49b, is rotatably mounted on the pin 49d. If one of the typing keys, 35 or 36 is depressed, the associated control tooth 49c moves into engagement with the cam shaft, as described in the patent to Schulze No. 1,789,661, dated Jan. 20, 1931, the control tooth 490 is first of all rotated slightly and then takes the draw hook 49 along with it to the right so that the intermediate lever 41 is swung round the shaft 52, in the clockwise direction. Accordingly, the type lever 54 is swung in the anticlockwise direction round the shaft 55, and strikes against the platen 5.

'l'l'ie spur wheel 28 (Figures 1 and 3) which is non-rotatably mounted on the shaft 21 (Figure 1) engages with a spur wheel 56, which is rigidly mounted on the shaft 51. The spur wheel 56 again is in engagement with-the spur wheel 59, rigidly mounted on the shaft 58 (Figures 1, 3, 5, 6, 8, 15 and 16). 1

Calculating mechanism including locking and unlocking mechanisms for said calculating mechanism The calculating mechanism drive shaft 56 (Figures 3, 5, 6 and 8), on one hand, is rotatably mounted in the bearing eye68, arranged in the right hand side of the machine housing l, and on the other hand, the part 58a, of the shaft 58,

isrotatably mounted in a bearingZBI, which is fixed by means of the screws 62, to a bridge 63 connecting the two side walls, 64 and 65. An-

other shaft, 68 (Figures 3, 5, 6, 8, 10) is rigidly by means and on this shaft, members to be hereinafter described, are swingably mounted.

In the bearing eye 8| (Figures 3 and 6), a cam 68 (Figures 3, 5, 6 and 8) is rotatably mounted by means of the sleeve 68a, rigidly fixed to the cam. The cam 58, is rigidly connected to the cams II and I2, by means of screws (not illustrated) which pass through holes 18, of the cams. The shaft, 58, however, remains without any action on the cams, since the cams 68, II and I2, as well as the sleeve, 68a, have greater bores 11 (Fig. 6) than the diameter of the shaft 58. The cams 68, II and 12 are prevented from lateral displacement, on the one hand, by contact of the side 68b, of the cam 58, with the edge Bla, of the bearing eye 8I' and on the other hand, by contact of the cam I2, with the toothed wheel I3, non-rotatably mountedon the square shaft 58. The toothed wheel 13 participatesin the rotation of the square shaft 58 which continually rotates in the arrow direction b (Fig. 6). On the cam I2, a pawl I8-(Figures 5, 6 and 8) is displaceably arranged by means of pins, 11 and I8, which engage in elongated slots I of the cam I2, in elongated slots 16, of the cam II andin elongated slots (not illustrated) in the cam 88. The pawl I8, is acted on continually in the direction of the arrow 0 (Figures 6 and 8) by a compression spring I8, which, on the one hand, abuts against the pin 18, fixed to the pawl I8, and on the other hand abuts against the face 12a, of the slot I5, in the cam 12. Morethe cams 68, II and I2, and the pawl 18 is pre-' vented from falling out. It may be remarked at this point that for the whole ten calculating keys 38, only one .coupling .as just described, is necessary.

The ten calculating'key levers 82 (Figures 1,

2, 3, 5, 6, 8 and which carry the calculating. keys 38, are swingably mounted on the shaft 88,-

already mentioned. The rearwardly, directed limbs of the calculating key levers 82, are somewhat upwardly bent at their ends, and have arched surfaces 82 (Figure 8) which co-act with arched surfaces 83 (Figure 10) of the downwardly directed projections 88, of the U-shaped stop members 85. The latter are swingably mounted on a shaft 81 (Figures 3, 4 and 10) which is rotatably mounted bymeans of two set screws 88 (Figures 4 and 10); Each of the set screws, 88 is screwed into a corresponding angle member 86a (Figure 4) the angle members being fixed by means of screws 88b to both side members 880 of the cradle housing. The stop members, 85, moreover, are held in position in the axial direction by means of distance pieces 85b (Figure 4), arranged on the'shaft 81.

On the left-hand limbs of the stop members 85, which correspond to the value 1 and.- 9 and on the right-hand limbs of the stop members 85 (Figure 4) which correspond to the values 2" to 8, projections 88 (Figures 3, 4 and 10), are arranged, with which engage springs 88, the springs on the other hand being connected to pins 88 (Figure 3). The pins 88, are riveted into angle members 8| (Figure 3) which, again are screwed by means of screws 8Ia, to a bar 82 (Figures 3 and 10) attached to the two side walls of the machine frame in any suitable manner. By means of these springs, 88, the stop pieces 85, are acted on in the clockwise direction round the shaft 81, so that they rest with their faces 85a (Figure 3), against the bar 82, whereby the normal position of these stop members 85 is determined. Since the calculating key levers 82, are acted upon by their own weight in the clockwise direction round their pivot shaft 68, and consequently rest with their arched faces 82a, against the arched faces 83, of the stop members, so that normal position of the calculating key levers 82,. is hereby determined. A depression simultaneously of two calcualting keys 38, or of a calculating key 38 and a decimal tabulator key 83 (Figures 1 and 2) is rendered impossible by the generally known roller key lock of the Mercedes Addelektra machine illustrated in Figure 9.

On each calculating key lever 82, a pawl, 85 is swingably mounted by means of a rivet 88 (Figures 3, 6, 8 and 10). With the nose 85a of this pawl, a spring 86, engages which, on the other hand, is connected to a nose 82g, arranged on the key lever 82. By means of this spring 88, the pawl 85, is acted on in the anti-clockwise direction round its rivet 88. The normal position of the pawl 85, is determined by the contact of the right-angled bent nose 85b, on the upper edge of the key lever 82. The downwardly directed and 85d of the pawl 85, is capable of co-acting with the right-angled upwardly-bent nose 81, of a bar 88. On the right and left hand ends of the bar 88, pins 880. (Figures 6 and 7) are formed, one pin being arranged at each end. By means of these pins, the bar 88, is swingably mounted on the levers I88 and IN, rigidly mounted on both ends of the shaft 88. The shaft 88 at its right hand side, is rotatably mounted by means of a set screw I82 (Figure 6) in a bearing member I83, which is fixed to a bar I85, by means of screws I88. 0n the left-hand side of the machine, the shaft 88 is rotatably mounted by means of a cone bearing I88 (Figure '7) in a bearing member I81, which is fixed with screws I 88, to the bar I85, already mentioned. The bar I85 is fixed to both side walls 68 and of the machine housing I,'by means of screws I85s (Fig: ure 5) which pass through holes I85a and I851) (Figures 6 and 'l) of the bar I85.

By means of a spring I88; which, on the one hand, engages with a lug 88b of the bar 88, and, on the other hand, is connected to a pin 88 (Figure 8) rigidly fixed to the shaft 89, the bar .88, is acted on in the anticlockwise direction round its pins 88a, so that its upper surface presses upwards against a bent lug I830. on the bearing block, I83, whereby the normal position of the-bar 88, is determined.

. or mm of the levers I88 and I8I.

A locking bar III) (Figures 3, 6, 7 and 8) is swingably mounted at both its ends on the shaft 88, in the manner indicated in Figures 6 and 7. At the right-hand and left-hand ends of the locking bar IIIL'further, pins 811 are fixed, with each of which a spring, IIIlb, (in Figure 6 this has not been illustrated for the purpose of rendering other parts visible), engages, which spring on the other hand, is connected to bentlugs IOIia By means of these springs I I8b the locking bar is always acted upon round the shaft 88 in the clockwise direction, whereby itsnorinal position is determined, on the one hand, by contact with the pin Iflllb,

riveted to the lever I and, on the other hand,

sake of illustration the same is indicated in the withdrawn position). The pin II2 of the lever II I, co-acts with the fork-shaped end of an arm IIS, of a three-armed lever IE4, which is swingably mounted on the shaft 68. The arm Illa of the three-armed lever H4, co-acts with the stud 68, already mentioned, of the pawl it, while the arm IIflb, of the same, co-acts with the cam E2, in a manner hereinafter described. A spring M5 engages with a pin Ildf (in Figure 6, the pin lldj is' shown'removed from the lever I for purposes of illustration) riveted to the nose IMd (Figure 6), the spring at its other end being I connected to a pin 5a (Figure 5) 'on a stay II5b,

which is fixed to the part 63 and to the cross stay M5. .By means of this spring, the three-armed lever H4, is acted on in'the clockwise direction round the shaft 58, in consequence of which the lever III connected to it, the shaft 99, and the levers IE0 and IN pinned to it, the locking flap I III, and finally the bar 98, are acted upon in the anti-clockwise direction, whereby on the one hand, the upper face of the lug 98x, under the action of the spring I09, and on the other hand, its edge, 38a under the action of the spring IIE, contacts with the edge I03g'of the lug I330, of the bearing member I03, whereby the normal position of the parts H4, III, 93, I00, IIII, III) and 98, is determined.

Further, on the shaft 68, a lever II6 (Figures 3, 6 and 8), is swingably mounted, at thefree end of which a roller I II is arranged, which is capa ble of co-acting with the cam 69. By means of the spring II9 which, on the one hand, engages with the pin, II 8 of the lever H6, and, on the other hand, is connected to the part 63, the roller III, is always maintained in contact with the cam 69.

, The lever I29, which similarly is swingably mounted on the shaft 68, is likewise capable of co-acting by means ofits rearwardly directed arm, I-29a (Figure 8) with the cam 69. By means of the spring I23 which, on the one hand, engages with the pin I2I and, on the other hand, is connectedto a. pin I22 (Figure8) of the bridge I05, the lever I20, is acted on in the clockwise direction round the shaft 86, whereby the projecfeeler fingers I29, are formed of different lengths (Figures 3 and 16) correspond to the values 1" to 9, and the feeler finger I29, lying farthest to the left (Figures and 16) is thelongest, and the right-angled bent part corresponding to the value "9 of the feeler finger I29, which is located on the shaft I28 at the right hand side of the machine to the left of the feeler finger I29 corresponding to the value 9, is the shortest.

The feeler finger I23, corresponding to the value 0" is arranged so as to be capable of being fixed by means of screws I29b (Figures 4 and 10) to a part, hereinafter described in detail, fixed to the projection I290 of a clamping member I29d. As the feeler finger I29, corresponding to the value 0" may not be allowed to execute any swingingmovement, calculating sector I'll would be swung therewith and in this manner a wrong value, would be registered and therefore the right-angled bent part of the feeler finger I29 (Fig. 16) corresponding to the value 0 is still longer than the right-angled bent part of the feeler finger I29, corresponding to the value fl.

The lever 81s, fixed on a shaft I42, co-acts with a locking lever 81a, mounted on the shaft 642, which locking lever is connected with the lever 81s by a spring 810. If no bar B'It, of a column totalizer lies over the nose 81s of the lever 81s or if the nose 81s lies in the intermediate space S'It' of two bars 81t, so the nose 81s" of the lever 31s, lies in the stop 8111. of the lever Qlu under the action of the spring 8111, whereby the rest position of the lever 81s is determined.

A roller lever I32, is loosely rotatable on a shaft 81 (Figures 6 and 10) and on the free forwardly-directed end of this lever, a roller I33, is mounted, which is capable of co-acting with the cam 69, hereinbefore described. To the roller lever I32, is joined a draw-bar I34 which, at its upwardly directed free end, is jointed by means of a screw I35 (Figures 3, 4 and 10) to the lever I31, which is loosely rotatable on the locking shaft I42. By means of a spring Ill, which, on the one hand, engages with the pin I38, rigidly mounted on the draw-bar and, on the other hand, is connected to a pin I40, rigidly mounted on the front wall I39 (Figures 3 and 6) of the calculating mechanism I26, the draw-bar I34, is acted upon always in the direction of the arrow a I loosely rotatable by means of set screws (not tion I2Ilb of this lever contacts with a part I2Il'c,

of being adjustedand fixed in position, and these fingers are forwardly bent at right angles at their downwardly-directed ends and are capable of co-acting by means of their slightly arched faces I38, with the stop pins I3I (as best shown in Figure 9) arranged on the stop members 85. The stop pins I3I, are mounted so as to be adjustable.

- illustrated) on the two side walls I25 of the calculating mechanism I26. To the lever I3'I, a pin I63, is fixed, which projects through an elongated hole I, of a lever I36, rigidly mounted on the locking shaft I42. A spring I45, engages -with the pin I63, of the lever I31, the other free end of the spring being connected to a pin I48, fixed to the lever I36, whereby both levers I36 and I3? are yieldingly connected to one another.

To the lever I36, a connecting member I48, is jointed by means of a screw I51, and this member is Jointed to an angle lever I50 (Figures 4, 10 and l5)v by means of a screw 3. The lever I58, again, is swingably mounted by means of a screw l6l, on an angle member I52, which is fixed by means of screws I53 (Figure 15) to the front wall I. To the angle lever I50 (Figure 10) is fixed a pin I55, which projects into a ring groove I53, ofa sleeve I51, and this sleeveis arranged so as to be axially displaceable on a shaft I53, mounted in any suitable manner in the I The right-angled forwardly bent parts of the two side walls I25, of the calculating mecha- 

